Sanding-machine.



G. SIMON.

SANDING MACHINE.

APPLICATION FILED AUG. 29, 1910 Patented Dec. 13,1910.

a BHEETW'BHEET 1.

22' JNVENTOR.

E e 015a Eir'r U11- WITNESSES: 2

{ )4, r ATTORNEY.

K/MQZAL.

ca. Wasnmarolv. n. c.

G. SIMON.

SANDING MACHINE.

APPLICATION FILED we. 29, 1910.

Patented Dec. 13, 1910.

2 SHEETS-SHEET 2.

V INVENTOR GEEIYQE in] DI- 1741440 ATTORNEY.

WITNESSES.- g (MAL UNITED STATES PATENT OFFICE.

GEORGE SIMON, OF NEW LONDON, WISCONSIN.

SANDING-MACHINE.

To all whom it may concern:

Be it known that I, GEORGE SIMON, a citizen of the United States,residing at New London, in the county of WVaupaca and State of\Visconsin, have invented a new and useful Sanding-Machine, of which thefollowing is a specification.

My invention relates to a machine for sanding and polishing round piecesof wood, and particularly, bent chair backs and similar bent orirregular shaped furniture pieces, and other stock, and it consists of asupporting stand upon the upper end and at one side of which is securedin a vertical plane a ring having gear teeth around the circumferencethereof, said ring being provided with a shoulder upon which a revolublering is mounted, the latter ring being provided with two pinions whichare each mounted for revolution with a shaft which passes through andrevolves in said revolving ring and each shaft is provided with asanding belt pulley on the side of the revolving ring op osite saidpinions. Each of said two pu leys are the driving pulleys for sandingbelts each of which is carried upon two idle pulleys which are arrangedupon the same opposite sides of the axial line of said revoluble ring astheir driving pulleys and between which two sanding belts the chair orother stock is to be fed by suitable feeding means, such as rolls, asherein described, with suitable power for operating the mechanism as isshown in the accompanying drawing, in which,

Figure 1 is a side elevation of the delivery side of the stock, showingthe sanding belts. Fig. 2 is a plan of the entire machine and its maindriving shaft. Fig. 3 is a side elevation showing the opposite side fromthat shown in Fig. 1. Fig. 4 is a detail showing the mounting of thesanding belt driving pulleys and that of their operating pinions. Fig. 5is a side elevation of an idle sanding belt pulley and an edge view ofthe bracket upon which it is mounted for revolution. Figs. 6 and 7 areplan and side elevation respectively of a chair back, that being one ofthe articles for which the machine is adapted to polish. Fig. 8 is avertical section across the fixed ring and the revoluble ring, andshowing how the latter is mounted on the former, and said former uponits supporting stand. Fig. 9 is a plan of a cap piece for receiving theupper ends of two feed roll shafts.

Specification of Letters Patent.

Application filed August 29, 1910.

Patented Dec. 13, 1910.

Serial No. 579,539.

Figs. 4 and 5 are upon a larger scale than the others.

Similar numerals indicate like parts in the several views.

1, indicates the stand upon which the sanding mechanism is mounted; 2, afixed ring arranged vertically and its lower ring part connected to theupper end of the stand at one side thereof with bolts 3, (see Fig. 8).The fixed ring is provided at the side thereof opposite its supportingstand, with a shoulder =1, upon which the revoluble ring is mounted, thering being retained upon said shoulder by means of a plurality of clips5 and screws (3. The stock to be sanded is represented by the chair back7, and it is to be fed in between the sanding belts from the side of themachine shown in Fig. 3. The fixed ring is provided with parallel bars8, which are provided with slotted ears 9, at each end, for theiradjustment toward or from the axial line of the rings, and are securedto the ring 2 with bolts 10.

Inside of the ring 2, feeding rolls 11 and 12, each having preferably alongitudinally concaved surface, are arranged upon their respectiveshafts 13 and 14. The roll 11 is tight upon the shaft 13, but the roll12 is loose upon the shaft 14 and is held in position thereon by meansof a collar 15, secured to the shaft. The shaft 13 is stepped in a step16, which is bolted to the bottom of the inside of the ring 2, and theshaft is provided with a retaining cap 17 which is bolted to the top ofthe inside of the ring. Secured to the shaft 13 near its lower end is abevel gear wheel 19, which is engaged and driven by the bevel gear wheel18, upon the shaft 20, which latter shaft may be called the feed drivingshaft. The support for the driving shaft is broken in Fig. 3 but itsposition can be seen in Fig. 2. It is arranged for running in the rightdirection for feeding material in between the rolls 11 and 12. The shaft1 1 is hinged upon the pin 21, at its lower end and is held within aslotted keeper 22, at its upper end for permitting material of varyingdiameter to be entered between the feed rolls. A spring 23, is arrangednear the upper end of said shaft for pressing the roll 12 toward theroll 11. Mounted upon stands 24 is a shaft 25 carrying a pulley 26 bywhich said shaft may be revolved from any suitable source of power. Uponthis shaft, is a pulley 27, which is arranged to drive the shaft 20 byits pulley 28, the latter shaft being arranged for revolution upon thestands 29. This as far as described comprises the feeding mechanism. Wewill now describe the sanding mechanism.

Upon the shaft 25 a gear wheel 30 is shown having teeth which areengaged with gear teeth on the ring 31, but gear teeth are notessential, the two wheels having pulley faces placed at a suitabledistance apart serving just as effectually, the teeth being shown formaking the machine more compact. Passing through the ring 31 are twoshafts 32, upon one end of each of which is a pinion 33, and upon theirother end a sanding'belt pulley 34, the pinions engaging the teeth ofthe fixed ring and the pulleys serving as the driving pulleys for twosanding belts. The revolutions of the pinions 33 and pulleys 34 areproduced by the teeth of the pinions engaging with the teeth of thefixed ring as the ring 31 is revolved around the fixed ring. Secured tothe ring 31 with screws 35 are two brackets 36, the stems 37, of whichare screw threaded and carry branching arms 38, from each of which ashaft- 39, extends, and upon which shafts the idle sanding belt pulleys410, are mounted. (See Fig. 5,). These sanding belt pulleys are providedwith side flanges 4-1, and the idle pulleys retained upon their shaftsby means of cotter pins 42, or otherwise, the pulleys 341 and pinions 33being keyed or otherwise made fast to their shafts. The arms 38 areadjustable upon the stems 37 by means of nuts 43, which engage thethreads of the stems for giving the necessary tension to the sandingbelts stat, of which there may be different lengths of pairs for sandingdifferent diameters of stock.

For receiving the stock being sanded as it is fed between the rolls 11and 12, posts 45, are erected in front of the rings, between which anarm 16 is secured, it extending from the posts horizontally, and havingtwo screw threaded rods 47 and 4S, stepped thereon, the rods extendingupward and their threads engaging the arms 49, which are arranged toextend horizontally, one above and one below the axial line of the ring31, the arms being broken in front of the sanding belts and idle pulleysso as not to obscure said parts. The rods are provided with intermeshinggears 50. and one of them with a square upper end 61, for receiving acrank by which the rods, which have right and left threads 52 and may beturned for adapting the distance between the arms 49 for the size of thestock being sanded. The parallel bars upon the entering side of thefixed ring and the arms upon the delivery side act as aids in supportingand holding the stock to be sanded. and do not require to be at alltimes in contact with it, and with some articles to be sanded, one orboth may be dispensed with, and with some light articles and theirnumber limited, they may be fed in between the sanding belts by theoperator, with possibly an assistant, by hand and without the use of thefeed rolls. The stock to be sanded is to be taken by the operator, whois to stand at the right hand of the machine in Fig. 1, and with theright hand enter the piece to be sanded, (which as shown in Fig. 6, hasone end tapered for the purpose), between the rolls 11 and 12, and as itis fed through between the two sanding belts, is to be received in theleft hand of the operator. It will be noted by the arrows in Fig. 1,that the sanding belts where they engage the piece being sanded, run inopposite directions, and as they are continually revolving around theaxial line of the rings, the article fed through will be sanded andpolished equally over its entire surface.

Arrows indicate the direction in which the sanding belts and the ringrun, but it should be understood that the direction for those to run isimmaterial, that for the feed rolls only being essential.

Having described my invention, what I claim and desire to secure byLetters Patent, is

1. In a sanding and polishing machine, a suitable stand or support forthe mechanism to be supported, a ring supported from one side of theupper end of said supporting means in a vertical plane and securedthereto at the lower portion of said ring, gear teeth around thecircumference of said ring, a shoulder upon the side of said fixed ringopposite its attached supporting means, a revoluble ring mounted forrevolution upon said shoulder, means for revolving the revo luble ringupon the shoulder of said fixed ring, two shafts passing through saidrevoluble ring, a pinion secured to one end of each shaft, the teeth ofwhich are engaged with the teeth around said fixed ring, a sanding beltpulley secured upon each of said shafts upon the opposite side of saidrevoluble ring from said pinions, and serving as driving pulleys forsanding belts, two idle pulleys for each driving pulley mounted forrevolution upon a suitable bracket, secured to said revoluble ring uponthe same side of the axial line of said revoluble ring as their drivingpulley, means for moving said idle pulleys toward and from their drivingpulley, a sanding belt mounted upon each driving and its two idlepulleys, and means for revolving said revoluble ring.

2. In a sanding and polishing machine comprising a fixed ring supportedvertically upon a suitable supporting stand and having gear teeth aroundits circumference, a revoluble ring mounted for revolution upon ashoulder upon said fixed ring, two pinions mounted each upon a shaftrevolubly arranged and extending through said revoluble ring and eachshaft being provided with a sanding belt pulley which serves as a driverin a sanding belt system, a sanding belt on each of said driving pulleysand one or more idle pulleys to each driving pulley of each system, thecombination of a feeding device for feeding the stock to be sandedthrough said fixed and revoluble rings, consisting of two shaftsarranged vertically and substantially parallel with each other andspaced apart across the inside of said fixed ring, one shaft revolublein suitable bearings secured upon the inside of said fixed ring at thetop and bottom thereof, a gear wheel secured upon said shaft, suitablemechanism and means provided for revolving said gear wheel, the othershaft being hinged near its lower end to a suitable holder secured atthe lower inside surface of said fixed ring and being movable at itsupper end within a suitable holder toward and from the revoluble shaft,a spring arranged near the upper end of said hinged shaft for pressingit toward the revoluble shaft, a feed roll secured to the revolubleshaft, a feed roll mounted loosely upon the hinged shaft, means forsupporting the loose roll at a corresponding height as the fixedrevolving roll, and a concave surface longitudinally of each roll whosesmallest diameter is arranged in the horizontal axial plane of saidfixed ring.

3. In a sanding and polishing machine, a suitable stand or support forthe mechanism to be supported, a ring supported from one side of theupper end of said supporting means in a vertical plane and securedthereto at the lower portion of said ring, gear teeth around thecircumference of said ring, a shoulder upon the side of said ringopposite its attached supporting means, a revoluble ring mounted forrevolution upon said shoulder, means for revolving the revoluble ringupon the shoulder of said fixed ring, two shafts passing through saidrevoluble ring, apinion secured to one end of each shaft, the teeth ofwhich are engaged with the teeth around said fixed ring, a sanding beltpulley secured upon each of said shafts upon the opposite side of saidrevoluble ring from said pinions, and serving as driving pulleys forsanding belts, two idle pulleys for each driving pulley mounted forrevolution upon a suitable bracket, secured to said revoluble ring uponthe same side of the axial line of said revoluble ring as their drivingpulley, means for moving said idle pulleys toward and from their drivingpul- Icy, a sanding belt mounted upon each driving and its two idlepulleys, means for revolving said revoluble ring, a feeding mechanismfor feeding the stock to be sanded through said rings and between thesanding belts, consisting of two shafts arranged vertically andsubstantially pa 'allel with each other and spaced apart across theinside of said fixed ring, one shaft revoluble in suitable bearingssecured upon the inside of said fixed ring at the top and bottomthereof, a gear wheel secured upon said shaft, suitable mechanism andmeans provided for revolving said gear wheel, the other shaft beinghinged near its lower end to a suitable holder secured at the lowerinside surface of said fixed ring and being movable at its upper endwithin a suitable holder toward and from the revoluble shaft, a springarranged near the upper end of said hinged shaft for pressii'ig ittoward the revoluble shaft, a feed roll secured to the revoluble shaft,a feed roll mounted loosely upon the hinged shaft, means for supportingthe loose roll at a corresponding height as the fixed revolving roll,and a concave surface longitudinally of each roll whose smallestdiameter is arranged in the horizontal axial plane of said fixed ring.

ll. In a sanding device for sanding and polishing chair backs and roundbent stock for furniture or other purposes, consisting of a stationaryring supported in a vertical plane upon a suitable support and having aring mounted for revolution upon said stationary ring through both ofwhich rings the article to be sanded is to be fed and two sanding beltsarranged upon said revoluble ring and revolving with it around thearticle to be sanded, the combination therewith of guiding bars'forguiding the article relative to said belts, consisting of twohorizontally arranged bars fitted to be attached to a stationary partupon opposite sides of the line of feed of the article to be sanded, andmade adjustable nearer to or farther from said line for adapting thespace between said bars to articles of different diameter.

GEORGE SIMON.

\Vitnesses V. F. BROWN, H. C. HILTON.

